Furuno FR-2105-B - Manual (Page 40)

-1.23-
1.19 Measuring Range and Bearing Between Two Targets
Press the EBL OFFSET key, and place the origin of No. 1 EBL, for example, on a target of
interest (target 1 in the illustrated example) by operating the trackball.
Turn the EBL control until the EBL passes through another target of interest (target 2).
Turn the VRM control until the range marker aligns with target 2. The active VRM readout at
the lower-right corner of the screen indicates the distance between the two targets.
You can repeat the same procedure on third and forth targets (targets 3 and 4) by using No. 2
EBL and No. 2 VRM.
Bearing is shown relative to own ship with suffix "R" or as a true bearing with suffix "T"
depending on EBL relative/true settings on the RADAR 1 menu. To return the EBL origin to
the own ship position, press the EBL OFFSET key again.
000 010
020
030
040
050
060
070
080
090
100
110
120
130
140
150
160
170 180 190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
EBL
origin
VRM
> 0.50NM<
0.98NM
EBL
> 140.0
°
R<
335.2 ° R
R1
R2
No.1 VRM
No.2 VRM
R2
Target 3
Target 4
Target 1
Target 2
Range
marker
No.1
EBL
No.2
EBL
Range
marker
Range/bearing
between targets
1 and 2
Range/bearing
between targets
3 and 4
1.20 Setting a Target Alarm Zone
CAUTION
The target alarm feature should never be relied upon as the sole means for detecting the
risk of potential collision. The operator of a ship is not relieved of the responsibility to keep
lookout for avoiding collisions, whether or not the radar is in use.
The target alarm serves to alert the navigator to targets (ships, landmasses, etc.) entering a
certain area with visual and audible alarms.